Tachyon Browser

Use this skill to control the k3s-hosted Chromium CDP gateway at:

browser-cdp.intra.quantum-box.com:9222

The gateway creates one Chromium Pod per /sessions/<session_id> and exposes it as a CDP WebSocket URL. It is intended for Cloudflare Mesh / WARP clients, such as Sakura VPS Claude Code, local Codex, and local automation.

Rules

• Always pass a ws://.../sessions/<id> CDP URL to agent-browser.
• Do not pass http://.../sessions/<id> to agent-browser; its HTTP CDP handling drops the path and falls back to the shared root browser.
• Use the same value for the remote session id and agent-browser --session when possible. This avoids local daemon confusion.
• Session ids must match [A-Za-z0-9._-]{1,96}.
• Named session state, including cookies, localStorage, and cache, persists while the session Pod is alive.
• Session state is lost when the Pod is deleted by idle timeout, TTL, or explicit DELETE.
• Idle timeout is 30 minutes. Absolute TTL is 6 hours.

Named Session

Use a named session when the user wants to reconnect to the same browser during a task.

SESSION_ID="sakura-job-001"

agent-browser \
  --cdp "ws://browser-cdp.intra.quantum-box.com:9222/sessions/${SESSION_ID}" \
  --session "${SESSION_ID}" \
  open https://example.com

Continue using the same SESSION_ID for subsequent commands:

agent-browser \
  --cdp "ws://browser-cdp.intra.quantum-box.com:9222/sessions/${SESSION_ID}" \
  --session "${SESSION_ID}" \
  snapshot -i

Delete the remote browser when done:

curl -sS -X DELETE "http://browser-cdp.intra.quantum-box.com:9222/sessions/${SESSION_ID}" | jq .

Temporary Session

Use a temporary session when the user does not care about the session id.

SESSION_JSON="$(curl -sS -X POST http://browser-cdp.intra.quantum-box.com:9222/sessions)"
SESSION_ID="$(printf '%s' "$SESSION_JSON" | jq -r .session_id)"
CDP_WS="$(printf '%s' "$SESSION_JSON" | jq -r .cdp_ws_url)"

agent-browser \
  --cdp "$CDP_WS" \
  --session "$SESSION_ID" \
  open https://example.com

curl -sS -X DELETE "http://browser-cdp.intra.quantum-box.com:9222/sessions/${SESSION_ID}" | jq .

Wrapper Script

Prefer the bundled helper when doing one-off checks. In Claude Code, the plugin's bin/ directory is added to PATH, so use remote-browser directly:

remote-browser \
  --temporary \
  --cleanup \
  -- open https://example.com

When using this skill folder directly outside a Claude plugin install, resolve the script path relative to this skill directory:

scripts/remote-browser.sh \
  --temporary \
  --cleanup \
  -- open https://example.com

Use a named browser:

scripts/remote-browser.sh \
  --session-id sakura-job-001 \
  -- open https://example.com

Create a temporary session and keep it:

scripts/remote-browser.sh \
  --temporary \
  --keep \
  -- open https://example.com

The script prints the remote session_id and cdp_ws_url to stderr before running agent-browser.

Inspect Sessions

curl -sS http://browser-cdp.intra.quantum-box.com:9222/readyz
curl -sS http://browser-cdp.intra.quantum-box.com:9222/sessions | jq .
curl -sS http://browser-cdp.intra.quantum-box.com:9222/sessions/<session_id>/json/version | jq .

The session list includes last_access_at, idle_seconds, idle_timeout_seconds, and ttl_seconds.

Playwright

For Playwright or direct CDP clients, connect to the WebSocket URL:

import { chromium } from 'playwright';

const browser = await chromium.connectOverCDP(
  'ws://browser-cdp.intra.quantum-box.com:9222/sessions/sakura-job-001',
);

Troubleshooting

• If commands affect the wrong browser, check whether the command used http://.../sessions/<id> instead of ws://.../sessions/<id>.
• If a session has stale local agent-browser state, close it with agent-browser --session <name> close and reconnect with the WebSocket CDP URL.
• If remote-browser is not found in Claude Code, verify the plugin is enabled and run /reload-plugins.
• If the gateway is unreachable, verify the machine is on Cloudflare Mesh / WARP and check /readyz.
• If Japanese text appears as boxes, verify the running session Pod uses the Playwright image with fonts-noto-cjk; the current gateway template installs it at startup.
• If durable browser profile state is required after Pod deletion, the current gateway does not provide that yet. It needs per-session PVC-backed --user-data-dir.